855656603 has 4 divisors (see below), whose sum is σ = 892859088. Its totient is φ = 818454120.

The previous prime is 855656509. The next prime is 855656609. The reversal of 855656603 is 306656558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 855656603 - 2¹⁰ = 855655579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (855656609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18601208 + ... + 18601253.

It is an arithmetic number, because the mean of its divisors is an integer number (223214772).

Almost surely, 2^855656603 is an apocalyptic number.

855656603 is a deficient number, since it is larger than the sum of its proper divisors (37202485).

855656603 is a wasteful number, since it uses less digits than its factorization.

855656603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37202484.

The product of its (nonzero) digits is 648000, while the sum is 44.

The square root of 855656603 is about 29251.6085540607. The cubic root of 855656603 is about 949.3648951747.

The spelling of 855656603 in words is "eight hundred fifty-five million, six hundred fifty-six thousand, six hundred three".